Repair Bobblehead

You'll likely learn about a settlement called Arefu as you explore Megaton near the beginning of the game, especially if you search for information amongst the drunk patrons at Moriarty's Saloon. Otherwise, you'll have to stumble on it by yourself. Arefu is a small village on top of a half-destroyed highway bridge. It's on the west side of the map (more towards the center), due west of Hamilton's Hideaway, northwest of Vault 106, and southwest of Paradise Falls. Just keep an eye on the horizon for a huge bridge, and you'll find what you're looking for.

Arefu is a place in trouble, but that has nothing to do with what you're doing here. In fact, though you'll likely visit this area during the side quest known as Blood Ties. But that's all irrelevant, because you can get this Bobblehead before, during, or after you complete the quest, if you choose to do it at all. Evan King is the sheriff and protector of the small settlement. Of the four or five houses you can enter in the settlement, Evan King's is one of them, but it's locked. Pick the lock and search a table inside the house to find the Bobblehead. Then, get out of that house before the well-armed King finds you!